Which best describes how scientists found the human gene that makes insulin? A. They worked backwards from mRNA to DNA.
B. They found insulin-producing genes in bacteria.
C. They used the base sequence to find the amino acid sequence.
D. They cloned insulin proteins using PCR

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.